denaturization

from The Century Dictionary.

• noun The act or process of denaturizing (as salt, in Germany, or seed-oils, in Spain); specifically, the addition to alcohol of something which renders it unfit for use as a beverage (thus exempting it, under special legislation, as in England, France, Germany, and the United States, from taxation), so as to permit its economical use as a fuel or in the manufacture of varnishes, chemicals, etc.
• noun A term introduced by Neumeister to designate a change effected in the physical or chemical properties of the albumins whereby they lose their individual characteristics and, if coagulated, can no longer be dissolved in their ordinary solvents. Denaturization can be brought about by heat, acids and alkalies, the salts of the heavy metals, etc.